Light source device and projection apparatus having light-combination device located at focus position of lenses

Abstract

Provided is a light source device, including: a first light source module, a set of lenses, a first light-homogenization component, a first light-combination device, and a wavelength conversion device. The first light source module is configured to emit a first light beam having first wavelength. The set of lenses and the first light-homogenization component are located in propagation path of the first light beam. The set of lenses is configured to converge the first light beam. The first light-homogenization component is configured to homogenize the first light beam. A second light beam formed by homogenization is incident on the first light-combination device, and the first light-combination device is located at a focus position of the set of lenses. The wavelength conversion device is located in propagation path of a third light beam emitted from the first light-combination device and configured to form excited light having second wavelength under excitation.

What is claimed is: 
     
       1. A light source device, comprising:
 a first light source module, a set of lenses, a first light-homogenization component, a first light-combination device, and a wavelength conversion device; 
 wherein the first light source module is configured to emit a first light beam having a first wavelength; 
 the set of lenses is located in a propagation path of the first light beam and configured to converge the first light beam, the converged first light beam is incident on the first light-combination device, and the first light-combination device is located at a focus position of the set of lenses; 
 the wavelength conversion device is located in a propagation path of a third light beam emitted from the first light-combination device and is configured to generate excited light having a second wavelength under excitation; and 
 the first light-homogenization component located in a light path between the set of lenses and the first light-combination device and configured to homogenize the first light beam, wherein the first light-homogenization component is an array of microlenses formed by a plurality of lenses, the first light beam is incident at a light entrance of the array of microlenses, and a second light beam formed after homogenization is emitted from a light exit of the array of microlenses to the first light-combination device. 
 
     
     
       2. The light source device according to  claim 1 , wherein the set of lenses comprises a first light converging lens, and the first light-combination device is located at a focus position of the first light converging lens;
 or the set of lenses comprises a combination of a plurality of lenses, and the first light-combination device is located at a focus position of a lens of the plurality of lenses closest to the first light-combination device in a propagation path of a light beam. 
 
     
     
       3. The light source device according to  claim 2 , further comprising a set of compression lenses, located in front of the first light-homogenization component in the propagation path of the light beam, and configured to compress a light spot of the first light beam. 
     
     
       4. The light source device according to  claim 3 , wherein the set of compression lenses comprises one or more of a positive compression lens or a negative compression lens. 
     
     
       5. The light source device according to  claim 1 , wherein exiting light of the light source device is incident to a spatial light modulator configured to modulate the exiting light, the first light source module is an array of first lasers, and a length-width ratio of the array of first lasers is equal to the length-width ratio of an array of microlenses of a spatial light modulator. 
     
     
       6. The light source device according to  claim 5 , further comprising:
 a second light source module configured to emit a fourth light beam having a third wavelength; and 
 a second light-combination device located in a light path of the first light beam and the fourth light beam, and configured to transmit or reflect the first light beam and correspondingly reflect or transmit the fourth light beam. 
 
     
     
       7. The light source device according to  claim 1 , further comprising:
 a second light source module configured to emit a fourth light beam having a third wavelength; and 
 a second light-combination device located in a light path of the first light beam and the fourth light beam, and configured to transmit or reflect the first light beam and correspondingly reflect or transmit the fourth light beam. 
 
     
     
       8. The light source device according to  claim 7 , wherein the first light source module comprises an array of blue lasers, the second light source module comprises an array of red lasers, the first light-combination device combines light beams of the first light beam and the fourth light beam after being homogenized by the first light-homogenization component. 
     
     
       9. The light source device according to  claim 8 , wherein the first light-combination device is a dichroscope and configured to split the second light beam into a first sub-light and a second sub-light, and the first sub-light light is transmitted or reflected to the wavelength conversion device. 
     
     
       10. The light source device according to  claim 9 , further comprising:
 a scattering plate corresponding to the first sub-light from the first light-combination device, and the second sub-light is reflected or transmitted to the scattering plate. 
 
     
     
       11. The light source device according to  claim 1 , further comprising:
 a third light source module, a second light-homogenization component and a third light-combination device; 
 wherein the third light source module is configured to emit a fifth light beam having a fourth wavelength; and 
 the second light-homogenization component is located in a propagation path of the fifth light beam and configured to homogenize the fifth light beam, and a sixth light beam formed after homogenization and the second light beam together are incident on the third light combination device and then are incident on the first light-combination device. 
 
     
     
       12. The light source device according to  claim 11 , wherein the first light source module is an array of red lasers, the third light source module is an array of blue lasers, the second light-homogenization component is a light-homogenization rod, the first light-combination device makes a middle portion of blue light incident on a scattering plate and makes red light and a remaining portion of the blue light incident on the wavelength conversion device. 
     
     
       13. The light source device according to  claim 5 , further comprising:
 a third light source module, a second light-homogenization component and a third light-combination device; 
 wherein the third light source module is configured to emit a fifth light beam having a fourth wavelength; and 
 the second light-homogenization component is located in a propagation path of the fifth light beam and configured to homogenize the fifth light beam, and a sixth light beam formed after homogenization and the second light beam together are incident on the third light combination device and then are incident on the first light-combination device. 
 
     
     
       14. A projection device, comprising a light source device, wherein the light source device comprises:
 a first light source module, a set of lenses, a first light-homogenization component, a first light-combination device, and a wavelength conversion device; 
 wherein the first light source module is configured to emit a first light beam having a first wavelength; 
 the set of lenses is located in a propagation path of the first light beam and configured to converge the first light beam, the converged first light beam is incident on the first light-combination device, and the first light-combination device is located at a focus position of the set of lenses; 
 the wavelength conversion device is located in a propagation path of a third light beam emitted from the first light-combination device and is configured to generate excited light having a second wavelength under excitation; and 
 the first light-homogenization component located in a light path between the set of lenses and the first light-combination device and configured to homogenize the first light beam, wherein the first light-homogenization component is an array of microlenses formed by a plurality of lenses, the first light beam is incident at a light entrance of the array of microlenses, and a second light beam formed after homogenization is emitted from a light exit of the array of microlenses to the first light-combination device. 
 
     
     
       15. The projection device according to  claim 14 , wherein exiting light of the light source device is incident to a spatial light modulator configured to modulate the exiting light, the first light source module is an array of first lasers, and a length-width ratio of the array of first lasers is equal to the length-width ratio of an array of microlenses of a spatial light modulator. 
     
     
       16. The projection device according to  claim 14 , wherein the light source device further comprises a set of compression lenses located in front of the first light-homogenization component in the propagation path of the light beam and configured to compress a light spot of the first light beam. 
     
     
       17. The projection device according to  claim 14 , wherein the light source device further comprises further comprises:
 a second light source module configured to emit a fourth light beam having a third wavelength; and 
 a second light-combination device located in a light path of the first light beam and the fourth light beam, and configured to transmit or reflect the first light beam and correspondingly reflect or transmit the fourth light beam. 
 
     
     
       18. The projection device according to  claim 17 , wherein the first light source module comprises an array of blue lasers, the second light source module comprises an array of red lasers, the first light-combination device combines light beams of the first light beam and the fourth light beam after being homogenized by the first light-homogenization component. 
     
     
       19. The projection device according to  claim 18 , wherein the first light-combination device is a dichroscope and configured to split the second light beam into a first sub-light and a second sub-light, and the first sub-light light is transmitted or reflected to the wavelength conversion device; and
 the light source device further comprises: 
 a scattering plate corresponding to the first sub-light from the first light-combination device, and the second sub-light is reflected or transmitted to the scattering plate. 
 
     
     
       20. The projection device according to  claim 14 , wherein the light source device further comprises:
 a third light source module, a second light-homogenization component and a third light-combination device; 
 wherein the third light source module is configured to emit a fifth light beam having a fourth wavelength; and 
 the second light-homogenization component is located in a propagation path of the fifth light beam and configured to homogenize the fifth light beam, and a sixth light beam formed after homogenization and the second light beam together are incident on the third light combination device and then are incident on the first light-combination device.